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Histoplasmic transfer: After nidation and before establishment of uteroplacental circulation, embryonic nutrition is derived from decidual cells and maternal blood pools that open up as a result of eroding activity of trophoblasts. Hematotrophic phase: After third week of gestation, substances are transported passively via intervillous space.
Prenatal nutrition addresses nutrient recommendations before and during pregnancy. Nutrition and weight management before and during pregnancy has a profound effect on the development of infants . This is a rather critical time for healthy development since infants rely heavily on maternal stores and nutrient for optimal growth and health ...
Low maternal vitamin B 12, defined as serum concentration less than 148 pmol/L, increases the risk of miscarriage, newborn low birth weight and preterm birth. [ 36 ] [ 34 ] During pregnancy the placenta concentrates B 12 , so that newborn infants have a higher serum concentration than their mothers. [ 33 ]
Maternal health is the health of people during pregnancy, childbirth, and the postpartum period.In most cases, maternal health encompasses the health care dimensions of family planning, preconception, prenatal, and postnatal care in order to ensure a positive and fulfilling experience.
Breast milk constitutes the sole source of nutrition for exclusively breastfed newborns, supplying all necessary nutrients for infants up to six months. Beyond this age, breast milk continues to be a source of energy for children up to two years old, providing over half of a child's energy needs up to the age of one and a third of the needs ...
Presentation of twins in Der Rosengarten ("The Rose Garden"), a German standard medical text for midwives published in 1513. In obstetrics, the presentation of a fetus about to be born specifies which anatomical part of the fetus is leading, that is, is closest to the pelvic inlet of the birth canal.
Modifiable risk factors include maternal obesity. [14] There is an elevated demand for insulin during pregnancy which leads to increased insulin production from pancreatic beta cells. The elevated demand is a result of increased maternal calorie intake and weight gain, and increased production of prolactin and growth hormone.
Suckling as proxy indicator of infecundity rather than a direct, hormonal causal factor is supported in studies contrasting the nursing intensity hypothesis, which says that more intense (prolonged, frequent) breastfeeding will result in a longer period of lactational amenorrhea, and the metabolic load model, which posits that maternal energy ...